Gripper for printing-presses



J. B. WILLS GRIPPER FOR PRINTING PRESSES.

APPLICATION FILED JuLYn. 1918- 1,324,946. Patented Dec. 16,1919.

FIBJ...

. FIE-1.5.

04 W 7% Mi JOHN-BALLARD WILLS, OF PITTSBURGH, PENNSYLVANIA, A SS IGNO R'OF ONE-THIRD TO DAVID W. BROBEGK, OF PITTSBURGH, PENNSYLVANIA.

GRIPPER FOR PRINTING-PRESSES.

Specification of Letters Patent.

PatentedDec.16, 1919.

Application filed J'ulyl'i, 1918. Serial No. 245,281.

To all whom it may concern: 7

Be it known that I, JQHN BALLARD \Vmns, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Grippers for Printing-Presses; and I do hereby declare the following to he a full, clear, and exact description thereof. Y

My invention relates to attachments for printing presses, and has special reference to an attachment for use in connection With the usual form of grippers on platen printing presses. p

' The main object of my invention is to form a cheap, simple and efficient attachment for platen presses which will provide for forming a perfect grip on the sheet of paper on which the printing is to be done without regard to the nature of such printing, and also in connection with the use of the usual and what is known as the perforatingrule. A further object of the invention is to form such a gripper attachment which will act as a stripper for the perforating rule during the use of such rule, and also one which will prevent the paper from sticking during the printing on the same.

A still further object of the invention is to provide such a gripper attachment which will be firmly held in place when set, will not slip and will be adjustable for any size of sheet or form desired. 7 i v To these ends my invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more specifically set forth andde: scribed and particularly pointed out inthe claims.

To enable others skilled inthe art to which my invention appertains to construct and use my improved gripper attachment, I will describe the same more fully, referring to the accompanying sheet of drawings, in

Figure l is a front plan view of a gripper applied to the slide of a platen printing press and having my improved attachment applied horizontally thereto; U V. Fig. 2. s a bottom plan view of the at; tachment; j

' form of the attachment;

3 iga cross-section on the line 3-3 lgl; r

Fig. A is a bottom plan view of another Fig 5 is a plan view of one of the usual iorms 0i a perforating rule; I

r g. 61s a front plan view of another As illustrated in the drawings, A repre .7

sents the. slideon the swinging bed a of e o n y pla n P ti g p s to which the gripper B is applied, such gripper being provided with the two main supportingor side bars 1 whichare secured at their inner ends to such slide by means of the-bolts C passing through holes 2 in the heads, 3-on On each side edge of the side bars 1 is a groove 4 which is formed four sided or square shape andlconnectedhorizontally to suchbars through such grooves, as herein-v after described is the cross or extension attachment F. This attachment F extends across the gripper and is formed double extension means by having two parallel rods 5 which are provided with heads ,6 secured at each end and such heads are hollowed out at their bottom faces to forma seat 7 and flanges 7 for fitting overthe side bars 1. A screw bolt 8-having a head 9 and a tour side or square end 10 passes through the outer end flange 7 of the heads 6 and such end 10 engages within the groove 4 in the outer end of the bars 1 to hold the attachment F in place, although if desired, such bolt can be placed on the inner side of the heads 6, so that'its' square end will engage within the groove 4 on the inside edge o t-the bars 1, as shown in Fig. 6.

V The parallel rods 5 are each provided with a rod extension portion 1 1 and a tubular por tion 12,.witha rod portion and a tubular exs tension portion on each of the 6 and said bars and through a slot D insaid slide the paper held by a firm grip through the per bars and at the position desired, while such rod portions are adapted to enter the tubular portions and thus form a space 13 between the same. The rod portion 11 and tubular portion 12 may be formed square in cross-section, as shown in section in Fi 7 In the use of the perforating rule E, such as is shown in Figs. 1 and 5, such rule is supported and locked in the chase or form member F of the press G in the usual manner, and in the operation of perforating the paper, the rule will enter the space 13 formed between the parallel rods 5 of the attachment F with the knife or cutting edge e outward and thus perforate the paper, while the operation of printing on the paper can also be performed in the usual manner and medium of the attachment. In this position the attachment can also be used for gripping the sheet of paper to be printed without using the perforated rule E.

* It will be obvious that my improved at tachment F can be used separately from the perforating rule E for gripping the sheet of paper to be printed, and that it can be attached as above described in a vertical position to the gripper B by cross-bars 1d supported at each end of the side bars 1 of the gripper B, as shown in Fig. 6, which crossbars are also attached to such bars 1 in the same manner as above described for the at tachment F being made to the bars 1, while such attachment in this position can also be used with the perforated rule E.

As shown in Fig. 1 one of the heads 6 can be dispensed with and the rod portions 11 bent in a semi-circular form at its free end to form the rounded head as shown at 15, and suoh free end threaded as at 16, so that a tubular portion having a like threaded end can be'screwed on to the same for forming the two parallel rods, with the space 13 between the same for ruling. In such case such closed end 15 and tubular portion 12 will act to hold the sheet down at the end of the line and along the same while being ruled and also prevent blurring.

It will thus be seen that my improved attachment for printing presses can be easily and cheaply manufactured and can be easily and uickly assembled and operated when desired, while such attachment will also be positive in its work, will always act to hold the sheet being printed or perforated, and thereby act to prevent sticking of the sheet.

It will also be seen that the device can be easily and conveniently used and adjusted to any position desired for the gripping of the paper or use of the perforating rule, and will be enabled to be firmly set on the gripany number of the attachments can be used on the gripper and in both vertical and horizontal positions.

Various modifications and changes in the design and construction of my improved attachment for platen printing presses, other than those described and shown, may be re sorted to, without departing from the spirit of the invention or sacrificing any of its advantages,

What I claim as my invention and desire to secure by Letters Patent is:

1. lhe combination with the movable gripper bars of a platen printing press, of a perforating rule mounted on the form member of the press, and cross-extension rods on said bars, comprising two parallel rod portions having a space formed between the same for allowing the perforating rule to enter therein in the movements of said rod portions, said rod portions thus acting to grip and strip the paper from the rule.

2. The combination with the movable gripper bars of a platen printing press, of a perforating rule mounted on the form member of the press, and cross-extension rods on said bars, comprising two parallel rod portions having a space formed between the same for allowing the perforating rule to enter therein in the movements of said rod portions, said rod portions being formed square in cross-section and acting to grip and strip the paper from the rule.

3. The combination with the movable gripper bars of a platen printing press, of a perforating rule mounted on the form member of the press, and cross-extension rods on said bars, comprising two parallel rod portions having a space formed between the same for allowing the perforating rule to enter therein in the movements of said rod portions, said rod portions being formed square in cross-section and having a tubular portion formed square in cross-section fitting over the same, and such rod portions acting to grip and strip the paper from the rule.

4. The combination with the movable gripper bars of a platen rinting press, of a perforating rule mounted on the form me1nber of the press, and cross-extension rods on said bars, comprising two parallel rod portions having a space formed between the same for allowing the perforating rule to enter therein in the movements of said rod portions, said rod portions having head portions for holding the same together and said rod portions being formed square in crosssection and having tubular portions formed square in cross-section fitting over the same, such rod portions acting to grip and strip the paper from the rule.

5. The combination with the movable gripper bars of a platen printing press, of a perforating rule mounted on the form member of the press, and cross-extension rods on said bars, comprising two parallel rod enter therein in the movements of said rod portions, said rod portions having head portions at each end for holding the same together and for being connected to said bars and said rod portions being formed square in cross-section fitting over the same, such rod portions acting to grip and strip the paperfrom therule. i

In testimony whereof, I, the said JOHN BALLARD VILLS, have hereunto set my hand.

' JOHN BALLARD WILLS.

Witnesses:

J. N. Comm, J. M. GEOGHEGAN. 

